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- W968476618 abstract "Organic synthesis has a rich history, ever since Friedrich Wohler’s synthesis of urea from ammonium cyanate in 1828 that gave birth to this important discipline of science. While organic synthesis has found many application and witnessed many triumphs in improving the quality of life, it is the creative instinct, reminiscent of art, associated with this discipline that holds special appeal. This creative flair finds its best expression in the domain of natural product synthesis, which has witnessed spectacular advances and attainments, particularly in the second half of the 20th century . Many natural products exhibit wide range of biological activities and thus provide useful leads for drug discovery. But very often, they are available only in minute quantities from natural sources and access to them poses threat to biodiversity conservation. Therefore, it is sometimes necessary to synthesize bioactive natural products to obtain requisite quantities and build diversity around their scaffold to explore their therapeutic potential. Thus, natural product synthesis provides an opportunity to organic chemists not only to demonstrate their creativity and intellectual ability but also render available materials for possible application in human health and wellbeing. It is not surprising that the study of the chemistry, biology and synthesis of natural products has emerged as one of the most flourishing and rewarding frontiers in modern science. The efforts delineated in this thesis are the continuation of our research group’s long standing interest directed towards the total synthesis of structurally complex and biologically promising natural products. The present thesis entitled “Towards the total synthesis of polycyclic polyprenylated acyl phloroglucin (PPAP) natural products : garsubellin A and hyperforin” is organized in two parts. PART A : Towards the total synthesis of garsubellin A and PART B : Towards the total synthesis of hyperforin. PART A : TOWARDS THE TOTAL SYNTHESIS OF GARSUBELLIN A Part A deals with the studies towards the total synthesis of garsubellin A 1, a polycyclic polyprenylated acyl phloroglucin (PPAP) natural product. In the year 1997, garsubellin A was isolated from the wood of garcinia subelliptica by Fukuyama and coworkers. Structurally, garsubellin A belongs to a small but rapidly growing class of natural products characterized by the presence of a highly oxygenated and densely functionalized bicyclo[3.3.1]nonan-2,4,9-trione core embellished with more than one hydrophobic prenyl side chain. Apart from its enchanting structural architecture, garsubellin A 1 also exhibits promising biological activity. Neurodegenerative diseases like Alzheimer’s have been attributed to the deficiencies in the level of neurotransmitter acetylcholine (ACh). Any inducer of the enzyme choline acetyltransferase (ChAT), which is responsible for the biosynthesis of acetylcholine has therapeutic potential in the area of neuro degeneration. Preliminary investigations have indicated that 1 enhances in vitro choline…" @default.
- W968476618 created "2016-06-24" @default.
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- W968476618 date "2008-05-01" @default.
- W968476618 modified "2023-09-23" @default.
- W968476618 title "Towards The Total Synthesis Of Polycyclic Polyprenylated Acyl Phloroglucin (PPAP) Natural Products : Garsubellin A And Hyperforin" @default.
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